A liquid crystal display device and a method of manufacturing the same are disclosed. The liquid crystal display device includes a liquid crystal panel including gate pads connected to gate lines and data pads connected to data lines; at least one driving circuit mounted on a circuit substrate including poly-silicon thin-film transistors, formed by a low temperature poly-silicon (LTPS) process, and including circuit pads to be connected to the gate pads or data pads; and a conductive film to electrically connect the driving circuit and the gate pads or data pads.